Merge pull request #694 from apple/PR/hotfix-return-results

[Hotfix] Return results accordingly from the spawned process

Author: shahmishal

project.py

@@ -1002,7 +1002,7 @@ def start_process(self, project_subbuilder, default_timeout):
         not inherit the default timeout from the parent process.
         """
         common.set_default_execute_timeout(default_timeout)
-        project_subbuilder.build()
+        return project_subbuilder.build()
 
     def build(self, stdout=sys.stdout):
         # Setup process pool to submit work to